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Thread: Wot Dynamic Cyl air values drop at 3200 or 3950 everytime.

  1. #1
    Advanced Tuner ProTools4's Avatar
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    Unhappy Wot Dynamic Cyl air values drop at 3200 or 3950 everytime.

    2019 C7 A8 Base Vette
    AnA Smog legal super charger kit
    going Lean at 3200 or 4K RPM

    At WOT the calculated dynamic cyl air values SNAP downward about 20-30%
    this effectively robs 20+% of my pulse width / injector on time
    it happens every time WOT @ 3200RPM or 3950RPM like clock work.
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    Last edited by ProTools4; 01-11-2022 at 05:15 PM.
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  2. #2
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    Have you changed anything with your MAP, MAF/IAT?
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    Are you getting a p0108 by any chance? I see it has stock map sensor in it so no way to know boost and you aren't logging maf hz.

  4. #4
    Senior Tuner SultanHassanMasTuning's Avatar
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    any boost application you need to change your map and centri setup you need a breakout harness
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  5. #5
    Advanced Tuner ProTools4's Avatar
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    Stock MAF
    Stock MAP (128KPA)
    no Baro or IAT breakout
    No DTC P0108

    *your right I should favor MAF in Hz over AFGPS
    been looking at AFGPS for 2 decades so I favor that when the channel / pid list fills up

    AnA kit does not contain these parts and the goal was to calibrate the Legal Kit As Delivered.
    The builder and I are going to take the suggestions and add a breakout harness and LT4 MAP sensor.

    ??Any thoughts on whey the CyL Air Calculation jumps so far out?
    ?? or how to tame the math that alters the Cly Air Calc?
    NotoriouSS TAD
    DATLS7N 73' Datsun 620 LS7/HNC/TR6060/4.10/T2/2450lbs/603RWHP
    J5 - 96' Impala SS - 4700lb autocross machine
    Langston - 96' Caprice 9C1 Beater
    Rosie - 67' El Co - race truck w/ plates
    Wall-E - 21' Tesla Model 3P

  6. #6
    Senior Tuner Ben Charles's Avatar
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    It’s jumps out Bc the baro sensor in the MAF sees boost pressure and not atmosphere

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  7. #7
    Advanced Tuner 4wheelinls1's Avatar
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    Not familiar with the kit, does it blow through the MAF, what boost is expected?

    What happens if you alter 4216 and 4606 correlation between MAP and BARO sensor? It faults at 115 kpa and the 4606 is set to 15 kpa, assuming Baro is 100kpa maybe you can just raise above the boost?

    It should have the VVE tuned, it hasn't been.